Frequencies for first 10,000 rows of crnry_care_unit_srvc_cd variable in pos2002 dataset :

       srv: |
   coronary |
  care unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,812       88.12       88.12
          0 |        626        6.26       94.38
          1 |        536        5.36       99.74
          2 |         23        0.23       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017